On April 15, 1215, King Hailing set up an altar in Tianyun City, the capital of the Chengtian Empire, burned incense and prayed, complained bitterly about Beihai's injustice, and ordered the three armies to wear filial piety, in the name of revenge of the previous emperor, and officially declared war on the Beihai Kingdom.

On April 23, Dadali, known as the "Pulsatilla", led the main forces of the Far North Army and the Tianlong Army to brazenly cross the western border of the Chengtian Beihai and attack Mulan County, thus opening the prelude to the Beihai War. As the gears of war began to turn, another marshal of the Chengtian Empire, the fierce general Chahe Buhua, known as the "Black Butcher", also led the Shangdang army stationed in Shangdang County, and a few days later, launched an attack on Menglan County in Beihai.

On April 30, the emperor of the Chengtian Empire, King Hailing, personally led the main force of the Black Bear Legion of Hejian County, the Emperor's pro-army Chengtian Legion stationed in Chengtian County, and the Flying Eagle Legion of the air combat unit entered the border area of Beihai County. In addition, as a mobile force, the Holy Cavalry Regiment led by the Black Wolf Daluo General Jebe also cooperated with the actions of King Hailing, and marched into Beihai County from the middle battlefield, and the troops were directed at Beihai City, the capital of Beihai.

Although Beihai City is the capital of the Beihai Kingdom, there is also the Tianyang Mountain Range as its natural barrier. But Beihai City itself is not in danger to defend, and Haitian will not defend Beihai City. In fact, for the Chengtian Empire and the Beihai Kingdom, the Tianbao Mountain Range behind Beihai City is the winner of this war. Once Tianbao Mountain is lost, the Chengtian Empire will gain a direct passage to attack the Great Snow Mountain. Although the Great Snow Mountain is the holy land of the Tianyun Continent, it is easy to defend and difficult to attack, and there is a mysterious white light to block it, but everything is not afraid of ten thousand, just in case. Once the Chengtian Empire found a way to crack the Guardian White Light, it forcibly entered the Great Snow Mountain. Then, for the North Sea Kingdom, the consequences will be unimaginable. King Hailing and Haitian both knew this. However, the ambitious emperor must first deal with the Beihai defenders of Mulan County and Menglan County on the western and eastern fronts. Otherwise, if you insist on rushing forward and directly raid Tianbao Mountain from Beihai County in the middle lane, this will be no different from looking for death.

In short, King Hailing's tactics are very simple, which can be summed up as a mid-road assault, with both wings flying together, and finally the three-way army will join forces at the foot of Tianbao Mountain and attack Tianbao Mountain with absolute superiority.

In order to eliminate the Beihai Kingdom as soon as possible, King Hailing mobilized about eighty percent of the strength of the Chengtian Empire, and at the same time mobilized about 20 million reserve troops to replenish the front line at any time. The Chengtian Empire was vast, occupying most of the area north of the Yunhe River, and had several large counties under its jurisdiction. First of all, Chengtian County, the capital Tianyun City is in Chengtian County, and Tianlong County, that is, the original Longshan County. After the Longshan Empire was destroyed by the Chengtian Empire, the Chengtian Empire renamed Longshan County as Tianlong County, and Longshan City, where the county seat was located, was renamed Tianlong City after the Chengtian Empire was established. Shangdang County is also bordered by Yunhe River in the south, and borders with Menglan County in Beihai in the east, and the county seat is Shangdang City. In addition to these four counties, the Chengtian Empire also has their birthplace, the Arctic Prairie, where the Arctic Legion has been stationed for many years. The Holy City of Thor, on the extremely northern steppe, is the holy place of the Chengtian Empire and the sacred place of worship of all the Chengtian people. It is said that the ancestor of Chengtian, the founding emperor of the Black Wolf the Great, was incarnated from a wolf, and relied on the Holy City of Ator to achieve today's immortal hegemony.

The Chengtian Empire has the world's largest army, and the army's uniforms are basically black. Ordinary soldiers wore armor made of iron cowhide. At the last moment before it takes shape, it will be soaked in the Lake of the Celestial Wolf in the Holy City of Ator for seven hundred and forty-nine days. When finished, it is extremely tough and can defend against normal enemy attacks many times on the battlefield with little damage.

The Iron Ox is a rare breed of cattle in the Chengtian Empire, and the skin on its body cannot be pierced by ordinary swords. Of course, the iron bull armor on the Chengtian army is not 100% made of iron cow leather, and for the Chengtian Empire, naturally there are not so many iron oxen that can be used to make armor luxuriously. Therefore, the ordinary Iron Bull Armor only adds a small amount of Iron Cowhide to increase the soldier's defense on the battlefield, thereby increasing its survivability. And once promoted to officer, the quality of the armor will be significantly improved. For example, the Ten Figures of the Chengtian Empire can be protected by complete iron bull armor by virtue of their combat exploits, while most of the helmets of officers above the Ten Figures are wolf tooth helmets, a rare helmet made of the skull of a heavenly wolf. On top of that, a very small number of generals have their own exclusive armor. For example, the second warrior of the Chengtian Empire, the black wolf Daluo general Jebe. His black wolf armor and black wolf helmet were the talisman of the black wolf generals of the past dynasties, and the combat equipment of the Black Wolf Emperor, the founding emperor of the Chengtian Empire. In addition to bows and arrows, the soldiers of Chengtian were also armed with a full moon scimitar. The material of the Full Moon Scimitar itself is extremely ordinary, mainly made of iron and copper. However, its production technology is an absolute military secret of the Chengtian Empire, and the Wutie family in Tianyun City has created this special full moon scimitar for the Chengtian Empire for generations, and its patriarch is the hereditary prince of the Chengtian Empire, and his status is respected. The reason why the full moon scimitar can become the main battle equipment of the Chengtian army is that it is extremely suitable for the cavalry to fight in close combat under high-speed sprinting, coupled with the mysterious production technology of the Wutie family, the full moon scimitar is extremely sharp, and the blade will never be embedded in the flesh and bones of people in high-speed slashing. In the Chengtian Empire, almost every Chengtian warrior is skilled in swordsmanship, and he is a natural swordsman. In this regard, the snow wolf cavalry in Beihai is similar to the Chengtian cavalry, and it is also the majority of sword-wielders. Of course, the reason why the Snow Wolf Cavalry was able to overwhelm the Holy Cavalry Regiment of the Heavenly Empire was mainly because of the Snow Wolf's own strong combat ability.

In contrast, the armor of the Northern Navy is all white as the main color, which is the opposite of the Chengtian army. Ordinary Beihai soldiers were dressed in white cloth armor, shields, swords, spears, bows and arrows were all basic equipment, and the soldiers chose their own choice. It is worth mentioning that pikemen were the most numerous in the Northern Navy, and among the generals of the North Sea there were many generals who used spears and spears. For example, Long Fei, who holds a black-toothed spear and is known as the black-toothed ice general. Although the white cloth armor smells like it is made of cloth, in fact, this cloth armor is a masterpiece of the wooden door. Because the raw material of white cloth armor is the clothes worn by ordinary people. The wooden door collects a large number of ordinary cloths, and after hundreds of years of research and development, this white cloth armor with defensive power slightly inferior to the Chengtian Iron Ox Armor has been made. Although the defensive power is not as good as the Iron Bull Armor, the cost of cloth armor is very low and the loss of national strength is very small, so it has become the standard equipment of the Beihai Army. Comparatively, the equipment of senior officers in Beihai is much better. For example, the ice armor worn by the ice warrior who commands 10,000 people is made of the 10,000-year-old ice of the Great Snow Mountain, while the ice general and the ice king of the North Sea are wearing a silver-white star armor specially made by the wooden gate, which can attract the power of the stars as a protective force when it is critical. As for the Ice God, he is dressed in the legendary Ice God robe. The Ice Divine Costume was made by the Beihai craftsmen in ancient times using the million-year-old Xuanbing Ice Heart at the top of the Great Snow Mountain, and there were only two pieces in the entire Beihai Kingdom, which was the first battle armor in the Tianyun Continent. The reason why the Ice God Cloak made of the Ice Heart of the Great Snow Mountain is called the No. 1 Battle Armor of the Tianyun Continent is not only because it will never be broken and its defense is amazing. What's more, if the owner dies, the Ice God Cloak will automatically return to the top of the Great Snow Mountain, which is a magic that other armors do not have. In fact, more importantly, the Ice God Cloak is equivalent to a life in a way, and it has its own mind that can extend the life of the Ice God itself. For many years, it is not uncommon for peerless generals with strength to be seen, but they all fell to the interrogation pass. It can be seen that if you want to get the Ice God Clothes, love is the most important factor.